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TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 1.2a high efficient step down converter with snooze mode check for samples: TPS62080 , TPS62080a , tps62081 , tps62082 1 features description the tps6208x devices are a family of high frequency ? dcs-control tm architecture for fast transient synchronous step down converters. with an input regulation voltage range of 2.3v to 6.0v, common battery ? snooze mode for 6.5 a ultra low quiescent technologies are supported. alternatively, the device current can be used for low voltage system power rails. ? 2.3v to 6.0v input voltage range the tps6208x focuses on high efficient step down ? supports high output capacitance up to conversion over a wide output current range. at 100 f medium to heavy loads, the converter operates in pwm mode and automatically enters power save ? 100% duty cycle for lowest dropout mode operation at light load currents to maintain high ? power save mode for light load efficiency efficiency over the entire load current range. to ? output discharge function maintain high efficiency at very low load or no load currents, a snooze mode with an ultra low quiescent ? short circuit protection current is implemented, that is enabled by the mode ? power good output pin. this function increases the run-time of battery ? thermal shutdown driven applications and keeps the standby current at its lowest level to meet green energy standards ? available in 2x2mm 8-pin son package targeting for a low stand-by current. applications to address the requirements of system power rails, the internal compensation circuit allows a large ? battery powered portable devices selection of external output capacitor values ranging ? point of load regulators from 10 f up to 100uf effective capacitance. with its ? system power rail voltage conversion dcs-control tm architecture excellent load transient performance and output voltage regulation accuracy is achieved. the device is available in 2x2mm son package with thermal pad. figure 1. typical application of tps62081 (1.8v fixed output) 1 please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. production data information is current as of publication date. copyright ? 2011 ? 2013, texas instruments incorporated products conform to specifications per the terms of the texas instruments standard warranty. production processing does not necessarily include testing of all parameters. tps62081 1 h 10f 2.3v .. 6v v in 22f 180k v out power good 1.8v sw vos vinen gnd mode pg fb
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com table 1. ordering information t a output voltage (1) package marking package part number (2) adjustable qvr 8-pin son TPS62080dsg 1.8 v qvs 8-pin son tps62081dsg ? 40 c to 85 c 3.3 v qvt 8-pin son tps62082dsg adjustable sbn 8-pin son TPS62080adsg (1) contact the factory to check availability of other fixed output voltage versions. (2) for detailed ordering information please check the package option addendum section at the end of this data sheet. absolute maximum ratings over operating free-air temperature range (unless otherwise noted) (1) value unit voltage range at vin, pg, vos (2) ? 0.3 to 7 v voltage range at sw (2) (3) ? 1 to 7 v voltage range at fb (2) ? 0.3 to 3.6 v voltage range at en, mode (2) ? 0.3 to (vin + 0.3v) v esd rating, human body model 2 kv esd rating, charged device model 500 v continuous total power dissipation see dissipation rating table operating junction temperature range, t j ? 40 to 150 c operating ambient temperature range, t a ? 40 to 85 c storage temperature range, t stg ? 65 to 150 c (1) stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. exposure to absolute ? maximum ? rated conditions for extended periods may affect device reliability. (2) all voltage values are with respect to network ground terminal. (3) during operation, device switching thermal information thermal metric (1) dsg (8 pins) units ja junction-to-ambient thermal resistance 59.7 jctop junction-to-case (top) thermal resistance 70.1 jb junction-to-board thermal resistance 30.9 c/w jt junction-to-top characterization parameter 1.4 jb junction-to-board characterization parameter 31.5 jcbot junction-to-case (bottom) thermal resistance 8.6 (1) for more information about traditional and new thermal metrics, see the ic package thermal metrics application report, spra953 . recommended operating conditions (1) min typ max unit v in input voltage range, vin 2.3 6.0 v v out output voltage range 0.5 4.0 v i snooze maximum load current in snooze mode 2 ma t a operating ambient temperature ? 40 85 c t j operating junction temperature ? 40 125 c (1) refer to the application information section for further information. 2 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 electrical characteristics over recommended free-air temperature range, t a = -40 c to 85 c, typical values are at t a = 25 c (unless otherwise noted), v in =3.6v, mode = low. parameter test conditions min typ max unit supply v in input voltage range 2.3 6.0 v quiescent current into vin i out = 0ma, device not switching 30 ua i q quiescent current into vin (snooze i out = 0ma, device not switching, mode=high 6.5 ua mode) i sd shutdown current into vin en = low 1 a under voltage lock out input voltage falling 1.8 2.0 v v uvlo under voltage lock out hysteresis rising above v uvlo 120 mv t jsd thermal shut down temperature rising 150 c thermal shutdown hysteresis temperature falling below t jsd 20 c logic interface (enable, mode) v ih high level input voltage 2.3v v in 6.0v 1 v v il low level input voltage 2.3v v in 6.0v 0.4 v i lkg input leakage current 0.01 0.5 a power good v pg power good threshold v out falling referenced to v out nominal ? 15 ? 10 ? 5 % power good hysteresis 5 % v il low level voltage i sink = 500 a 0.3 v i pg,lkg pg leakage current v pg = 5.0 v 0.01 0.1 a output output voltage range 0.5 4.0 v TPS62080, TPS62080a output voltage accuracy i out = 0 ma; v in 2.3v ? 2.5 2.5 % tps62081 v out output voltage accuracy i out = 0 ma; v in 3.6v ? 2.5 2.5 % tps62082 snooze mode output voltage accuracy mode = high; v in 2.3v and v in v out + 1v ? 5 5 % feedback regulation voltage v fb v in 2.3v and v in v out + 1v 0.438 0.45 0.462 v TPS62080, TPS62080a feedback input bias current i fb v fb = 0.45 v 10 100 na TPS62080, TPS62080a en = low, v out = 1.8 v 1 k ? r dis output discharge resistor TPS62080a , en = low, v out = 1.2 v, 25 40 65 line regulation 0 %/v load regulation tps62081, tps62082 -0.25 %/a high side fet on-resistance i sw = 500 ma 120 m ? r ds(on) low side fet on-resistance i sw = 500 ma 90 m ? i lim high side fet switch current limit rising inductor current 1.6 2.8 4 a copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 3 product folder links: TPS62080 TPS62080a tps62081 tps62082
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com device information qfn 8 pin 2x2 mm pin functions pin i/o description name no. vin 8 pwr power supply voltage input. en 1 in device enable logic input. logic high enables the device, logic low disables the device and turns it into shutdown. mode 3 in snooze mode enable logic input. logic high enables the snooze mode, logic low disables the snooze mode gnd 2 pwr power and signal ground. vos 5 in output voltage sense pin for the internal control loop. must be connected to output. sw 7 pwr switch pin connected to the internal mosfet switches and inductor terminal. connect the inductor of the output filter here. fb 4 in feedback pin for the internal control loop. connect this pin to the external feedback divider for the adjustable output version. for the fixed output voltage versions this pin must be left floating or connected to gnd. pg 6 out power good open drain output. this pin is pulled to low if the output voltage is below regulation limits. can be left floating if not used. thermal pad connect it to gnd. 4 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082 12 3 4 87 6 5 en gnd mode fb vinpg swvos thermal pad
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 functional block diagrams figure 2. functional block diagram (adjustable output voltage version) figure 3. functional block diagram (fixed output voltage version) copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 5 product folder links: TPS62080 TPS62080a tps62081 tps62082 thermal shutdown softstart under voltage shutdown direct control & compensation pg en vos ref power good mode fb ramp minimum on-timer dsc-control tm gate driver control logic low side n-mos high side n-mos vin sw gnd snooze mode comparator erroramplifier active output discharge gate driver control logic low side n-mos high side n-mos thermal shutdown softstart under voltage shutdown direct control & compensation vin sw gnd pg en vos ref active output discharge power good snooze mode mode fb ramp minimum on-timer dsc-control tm erroramplifier comparator
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com parameter measurement information table 2. list of components reference description manufacturer c1 10uf, ceramic capacitor, 6.3v, x5r, size 0603 std 22uf, ceramic capacitor, 6.3v, x5r, size 0805, c2 murata grm21br60j226me39l 47uf, tantalum capacitor, 8v, 35m , size 3528, c3 kemet t520b476m008ate035 l1 1.0 h, power inductor, 2.2a, size 3x3x1.2mm, xfl3012-102meb coilcraft depending on the output voltage of TPS62080, 1%; not be r1 populated for tps62081, tps62082; r2 39.2k, chip resistor, 1/16w, 1%, size 0603 std r3 178k, chip resistor, 1/16w, 1%, size 0603 std 6 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082 tps6208x l1 c1 r1 r2 v in power good sw vos vinen gnd mode pg fb c2 r3 v out c3
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 typical characteristics table 3. table of graphs figure TPS62080, load current, v out = 0.9v figure 4 TPS62080, load current, v out = 1.2v figure 5 efficiency TPS62080, load current, v out = 2.5v figure 6 tps62081, load current, v out = 1.8v figure 7 tps62082, load current, v out = 3.3v figure 8 TPS62080, input voltage, v out = 0.9v figure 9 TPS62080, input voltage, v out = 2.5v figure 10 tps62081, input voltage, v out = 1.8v figure 11 tps62082, input voltage, v out = 3.3v figure 12 output voltage accuracy TPS62080, load current, v out = 0.9v figure 13 TPS62080, load current, v out = 2.5v figure 14 tps62081, load current, v out = 1.8v figure 15 tps62082, load current, v out = 3.3v figure 16 input voltage, normal mode figure 17 quiescent current input voltage, snooze mode figure 18 input voltage, high side fet figure 19 r ds(on) input voltage, low side fet figure 20 TPS62080, load current, v out = 0.9v, figure 21 switching frequency TPS62080, load current, v out = 2.5v, figure 22 TPS62080, v in = 3.3v, v out = 1.2v, load current = 500ma, pwm mode figure 23 typical operation TPS62080, v in = 3.3v, v out = 1.2v, load current = 10ma, pfm mode figure 24 TPS62080, v in = 3.3v, v out = 1.2v, load current = 2ma, snooze mode figure 25 load transient TPS62080, v in = 3.3v, v out = 1.2v, load current = 50ma to 1a figure 26 line transient TPS62080, v in = 3.3v to 4.2v, v out = 1.2v, load = 2.2 figure 27 TPS62080, v in = 3.3v, v out = 1.2v, load = 2.2 figure 28 startup TPS62080, v in = 3.3v, v out = 1.2v, no load figure 29 shutdown with TPS62080, v in = 3.3v, v out = 1.2v, no load figure 30 output discharge efficiency efficiency vs vs load current load current figure 4. figure 5. copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 7 product folder links: TPS62080 TPS62080a tps62081 tps62082 0 10 20 30 40 50 60 70 80 90 100 10u 100u 1m 10m 100m 1 3 output current (a) efficiency (%) v in = 2.8 v v in = 3.6 v v in = 4.2 v v in = 2.8 v, snooze mode v in = 3.6 v, snooze mode v in = 4.2 v, snooze mode TPS62080 v out = 1.2 v g002 0 10 20 30 40 50 60 70 80 90 100 10u 100u 1m 10m 100m 1 3 output current (a) efficiency (%) v in = 2.8 v v in = 3.6 v v in = 4.2 v v in = 2.8 v, snooze mode v in = 3.6 v, snooze mode v in = 4.2 v, snooze mode TPS62080 v out = 0.9 v g001
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com efficiency efficiency vs vs load current load current figure 6. figure 7. efficiency output voltage vs vs load current input voltage figure 8. figure 9. output voltage output voltage vs vs input voltage input voltage figure 10. figure 11. 8 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082 0.880 0.885 0.890 0.895 0.900 0.905 0.910 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.8 input voltage (v) output voltage (v) i out = 1a, t a = 25c i out = 1a, t a = ?40c i out = 1a, t a = 85c i out = 10ma, t a = 25c i out = 10ma, t a = ?40c i out = 10ma, t a = 85c TPS62080 v out = 0.9 v g006 0 10 20 30 40 50 60 70 80 90 100 10u 100u 1m 10m 100m 1 3 output current (a) efficiency (%) v in = 3.6 v v in = 4.2 v v in = 5.0 v v in = 3.6 v, snooze mode v in = 4.2 v, snooze mode v in = 5.0 v, snooze mode TPS62080 v out = 2.5 v g003 0 10 20 30 40 50 60 70 80 90 100 10u 100u 1m 10m 100m 1 3 output current (a) efficiency (%) v in = 2.8 v v in = 3.6 v v in = 4.2 v v in = 2.8 v, snooze mode v in = 3.6 v, snooze mode v in = 4.2 v, snooze mode tps62081 v out = 1.8 v g005 2.44 2.46 2.48 2.50 2.52 2.54 2.56 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) output voltage (v) i out = 1a, t a = 25c i out = 1a, t a = ?40c i out = 1a, t a = 85c i out = 10ma, t a = 25c i out = 10ma, t a = ?40c i out = 10ma, t a = 85c TPS62080 v out = 2.5 v g007 1.70 1.72 1.74 1.76 1.78 1.80 1.82 1.84 1.86 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.8 input voltage (v) output voltage (v) i out = 1a, t a = 25c i out = 1a, t a = ?40c i out = 1a, t a = 85c i out = 10ma, t a = 25c i out = 10ma, t a = ?40c i out = 10ma, t a = 85c tps62081 v out = 1.8 v g008 0 10 20 30 40 50 60 70 80 90 100 10u 100u 1m 10m 100m 1 3 output current (a) efficiency (%) v in = 3.6 v v in = 4.2 v v in = 5.0 v v in = 3.6 v, snooze mode v in = 4.2 v, snooze mode v in = 5.0 v, snooze mode tps62082 v out = 3.3 v g004
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 output voltage output voltage vs vs input voltage load current figure 12. figure 13. output voltage output voltage vs vs load current load current figure 14. figure 15. output voltage quiescent current vs vs load current input voltage figure 16. figure 17. copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 9 product folder links: TPS62080 TPS62080a tps62081 tps62082 3.24 3.26 3.28 3.30 3.32 3.34 10u 100u 1m 10m 100m 1 3 output current (a) output voltage (v) t a = 25c t a = ?40c t a = 85c tps62082v in = 3.6 v g013 15u 20u 25u 30u 35u 40u 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.8 input voltage (v) quiescent current (a) t a = 25c t a = ?40c t a = 85c i out = 0 a, mode = low g016 2.46 2.48 2.50 2.52 2.54 10u 100u 1m 10m 100m 1 3 output current (a) output voltage (v) t a = 25c t a = ?40c t a = 85c TPS62080 v in = 3.6 v g011 1.76 1.78 1.80 1.82 1.84 10u 100u 1m 10m 100m 1 3 output current (a) output voltage (v) t a = 25c t a = ?40c t a = 85c tps62081 v in = 3.6 v g012 3.18 3.20 3.22 3.24 3.26 3.28 3.30 3.32 3.34 3.36 3.3 3.8 4.3 4.8 5.3 5.8 input voltage (v) output voltage (v) i out = 1a, t a = 25c i out = 1a, t a = ?40c i out = 1a, t a = 85c i out = 10ma, t a = 25c i out = 10ma, t a = ?40c i out = 10ma, t a = 85c tps62082 v out = 3.3 v g009 0.890 0.892 0.894 0.896 0.898 0.900 0.902 0.904 0.906 0.908 0.910 10u 100u 1m 10m 100m 1 3 output current (a) output voltage (v) t a = 25c t a = ?40c t a = 85c TPS62080 v in = 3.6 v g010
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com quiescent current high side fet r ds(on) vs vs input voltage input voltage figure 18. figure 19. low side fet r ds(on) switching frequency vs vs input voltage load current figure 20. figure 21. switching frequency vs load current typical application (pwm mode) figure 22. figure 23. 10 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082 20 60 100 140 180 220 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.8 input voltage (v) fet on?resistance (m w ) t a = 25c t a = ?40c t a = 85c g019 0 500k 1m 1.5m 2m 2.5m 3m 0 400m 800m 1.2 1.6 output current (a) switching frequency (hz) v in = 2.3v v in = 3.3v v in = 4.2v v in = 5.0v TPS62080v out = 0.9v g014 2u 3.5u 5u 6.5u 8u 9.5u 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.8 input voltage (v) quiescent current (a) t a = 25c t a = ?40c t a = 85c i out = 0 a, snooze mode g017 50 90 130 170 210 250 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.8 input voltage (v) fet on?resistance (m w ) t a = 25c t a = ?40c t a = 85c g018 sw2v/div t - 200ns/div v20mv/div out l0.5a/div coil 0 500k 1m 1.5m 2m 2.5m 3m 3.5m 4m 4.5m 0 400m 800m 1.2 1.6 output current (a) switching frequency (hz) v in = 2.5v v in = 3.3v v in = 4.2v v in = 5.0v TPS62080v out = 2.5v g015
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 typical application (pfm mode) typical application (snooze mode) figure 24. figure 25. load transient line transient figure 26. figure 27. copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 11 product folder links: TPS62080 TPS62080a tps62081 tps62082 load1a/div t - 50 s/div v20mv/div out l1a/div coil 1a 50ma t - 100 s/div v50mv/div out 3.3v 4.2v v1v/div in sw2v/div t - 2 s/div v20mv/div out l0.2a/div coil sw2v/div t - 50 s/div v50mv/div out l0.2a/div coil
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com start up start up (without load) figure 28. figure 29. shut down figure 30. 12 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082 en5v/div t - 20ms/div v0.5v/div out en5v/div t - 20 s/div v1v/div out l0.5a/div coil pg1v/div en5v/div t - 20 s/div v1v/div out l0.2a/div coil pg1v/div
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 detailed description device operation the tps6208x synchronous switched mode converters are based on dcs ? control (direct control with seamless transition into power save mode). this is an advanced regulation topology that combines the advantages of hysteretic and voltage mode control. the dcs ? control topology operates in pwm (pulse width modulation) mode for medium to heavy load conditions and in power save mode at light load currents. in pwm the converter operates with its nominal switching frequency of 2mhz having a controlled frequency variation over the input voltage range. as the load current decreases the converter enters power save mode, reducing the switching frequency and minimizing the ic quiescent current to achieve high efficiency over the entire load current range. dcs ? control supports both operation modes (pwm and pfm) using a single building block having a seamless transition from pwm to power save mode without effects on the output voltage. fixed output voltage versions provide smallest solution size combined with lowest quiescent current. the tps6208x offers both excellent dc voltage and superior load transient regulation, combined with very low output voltage ripple, minimizing interference with rf circuits. the device is equipped with the snooze mode functionality, which is enabled with the mode pin. the snooze mode supports high efficiency conversion at lowest output currents below 2ma. if no load current is drawn, the ultra low quiescent current of 6.5ua is sufficient to maintain the output voltage. this extends battery run time by reducing the quiescent current during lowest or no load conditions in battery driven applications. for mains- operated voltage supplies, the snooze mode reduces the system's stand-by energy consumption. during shutdown (en = low), the device reduces energy consumption to less than 1ua. power save mode as the load current decreases the tps6208x will enter the power save mode operation. during power save mode the converter operates with reduced switching frequency in pfm mode and with a minimum quiescent current maintaining high efficiency. the power save mode occurs when the inductor current becomes discontinuous. it is based on a fixed on time architecture. the typical on time is given by t on =400ns (v out / v in ). the switching frequency over the whole load current range is shown in figure 21 and figure 22 . snooze mode the tps6208x offers a snooze mode function. if the snooze mode is enabled by an external logic signal setting the mode pin to high, the device's quiescent current consumption is reduced to typically 6.5 a. as a result, the high efficiency range is extended towards the range of lowest output currents below 2ma, see the typical characteristics efficiency figures. if the device is operating in snooze mode, a dedicated, low power consuming block monitors the output voltage. all other control blocks are snoozing during that time. if the output voltage falls below the programmed output voltage by 3.5% (typ), the control blocks wake up, regulates the output voltage and allow themselves to snooze again until the output voltage drops again. the snooze mode operation provides a clear efficiency improvement at lowest output currents. if the load current increases, the advantage of efficiency in snooze mode will be deprived. since the dynamic load regulation operates best if the snooze mode is disabled, it is recommended to turn off the snooze mode by external logic signal if the load current exceeds 2ma, like a micro controller to operate the mode pin. 100% duty cycle low dropout operation the device offers low input to output voltage difference by entering 100% duty cycle mode. in this mode the high side mosfet switch is constantly turned on and the low side mosfet is switched off. this is particularly useful in battery powered applications to achieve longest operation time by taking full advantage of the whole battery voltage range. the minimum input voltage to maintain switching regulation, depending on the load current and output voltage can be calculated as: (1) with: v in,min = minimum input voltage i out,max = maximum output current copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 13 product folder links: TPS62080 TPS62080a tps62081 tps62082 in,min out out,max ds(on) l v v i (r + r ) = +
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com r ds(on) = high side fet on-resistance r l = inductor ohmic resistance enabling / disabling the device the device is enabled by setting the en input to a logic high. accordingly, a logic low disables the device. if the device is enabled, the internal power stage will start switching and regulate the output voltage to the programmed threshold. the en input must be terminated with a resistance less than 1m pulled to vin or gnd. output discharge the output gets discharged by the sw pin with a typical discharge resistor of r dis whenever the device shuts down. this is the case when the device gets disabled by enable, thermal shutdown trigger, and undervoltage lockout trigger. soft start after enabling the device, an internal soft-start circuitry monotonically ramps up the output voltage and reaches the nominal output voltage during a soft start time (100 s, typical). this avoids excessive inrush current and creates a smooth output voltage rise slope. it also prevents excessive voltage drops of primary cells and rechargeable batteries with high internal impedance. if the output voltage is not reached within the soft start time, such as in the case of heavy load, the converter will enter regular operation. consequently, the inductor current limit will operate as described below. the tps6208x is able to start into a pre-biased output capacitor. the converter starts with the applied bias voltage and ramps the output voltage to its nominal value. power good the tps6208x has a power good output going low when the output voltage is below its nominal value. the power good keeps high impedance once the output is above 95% of the regulated voltage, and is driven to low once the output voltage falls below typically 90% of the regulated voltage. the pg pin is a open drain output and is specified to sink typically up to 0.5ma. the power good output requires a pull up resistor that is recommended connecting to the device output. when the device is off due to disable, uvlo or thermal shutdown, the pg pin is at high impedance. the pg signal can be used for sequencing of multiple rails by connecting to the en pin of other converters. leave the pg pin unconnected when not used. under voltage lockout to avoid mis-operation of the device at low input voltages, an under voltage lockout is implemented, that shuts down the device at voltages lower than v uvlo with a v hys_uvlo hysteresis. thermal shutdown the device goes into thermal shutdown once the junction temperature exceeds typically t jsd . once the device temperature falls below the threshold the device returns to normal operation automatically. inductor current limit the inductor current limit prevents the device from high inductor current and drawing excessive current from the battery or input voltage rail. excessive current might occur with a shorted/saturated inductor or a heavy load/shorted output circuit condition. the incorporated inductor peak current limit measures the current during the high side and low side power mosfet on-phase in pwm mode. once the high side switch current limit is tripped, the high side mosfet is turned off and the low side mosfet is turned on to reduce the inductor current. until the inductor current drops down to low side switch current limit, the low side mosfet is turned off and the high side switch is turned on again. this operation repeats until the inductor current does not reach the high side switch current limit. due to the internal propagation delay, the real current limit value can exceed the static current limit in the electrical characteristics table. 14 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 application information output filter design the inductor and the output capacitor together provide a low pass frequency filter. to simplify this process table 4 outlines possible inductor and capacitor value combinations for the most application. table 4. matrix of output capacitor / inductor combinations c out [ f] (1) l [ h] (1) 10 22 47 100 150 0.47 1 + + (2) (3) + + 2.2 + + + + 4.7 (1) capacitance tolerance and bias voltage de-rating is anticipated. the effective capacitance can vary by+20% and -50%. inductor tolerance and current de-rating is anticipated. the effective inductance can vary by +20% and -30%. (2) plus mark indicates recommended filter combinations. (3) filter combination in typical application. inductor selection main parameter for the inductor selection is the inductor value and then the saturation current of the inductor. to calculate the maximum inductor current under static load conditions, equation 4 is given. (2) where i out,max = maximum output current i l = inductor current ripple f sw = switching frequency l = inductor value it's recommended to choose the saturation current for the inductor 20%~30% higher than the i l,max , out of equation 4. a higher inductor value is also useful to lower ripple current, but will increase the transient response time as well. the following inductors are recommended to be used in designs. table 5. list of recommended inductors inductance current rating dimensions dc resistance type manufacturer [ h] [ma] l x w x h [mm 3 ] [m typ] 1.0 2500 3 x 3 x 1.2 35 xfl3012-102me coilcraft 1.0 1650 3 x 3 x 1.2 40 lqh3npn1r0nj0 murata 2.2 2500 4 x 3.7 x 1.65 49 lqh44pn2r2mp0 murata 2.2 1600 3 x 3 x 1.2 81 xfl3012-222me coilcraft capacitor selection the input capacitor is the low impedance energy source for the converter which helps to provide stable operation. a low esr multilayer ceramic capacitor is recommended for best filtering and should be placed between vin and pgnd as close as possible to that pins. for most applications 10 f will be sufficient, a larger value reduces input current ripple. copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 15 product folder links: TPS62080 TPS62080a tps62081 tps62082 sw in out out l l max , out max ,l f l v v 1 v i 2 i i i - = d d + =
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com the architecture of the tps6208x allows to use tiny ceramic-type output capacitors with low equivalent series resistance (esr). these capacitors provide low output voltage ripple and are recommended. to keep its resistance up to high frequencies and to get narrow capacitance variation with temperature, it's recommended to use x7r or x5r dielectric. the tps6208x is designed to operate with an output capacitance of 10 f to 100 f, as outlined in table 4 . table 6. list of recommended capacitors capacitance dimensions type manufacturer [ f] l x w x h [mm 3 ] 10 grm188r60j106m 0603: 1.6 x 0.8 x 0.8 murata 22 grm188r60g226m 0603: 1.6 x 0.8 x 0.8 murata 22 grm21br60j226m 0805: 2.0 x 1.2 x 1.25 murata setting the output voltage the tps608x devices are available as fixed and adjustable output voltage versions. the fixed versions are internally programmed to a fixed output voltage, whereas the adjustable output voltage version needs to be programmed via an external voltage divider to set the desired output voltage. adjustable output voltage version for the adjustable output voltage version, an external resistor divider is used. by selecting r 1 and r 2 , the output voltage is programmed to the desired value. figure 31. typical application circuit for adjustable output voltage option when the output voltage is regulated, the typical voltage at the fb pin is v fb for the adjustable devices. the following equation can be used to calculate r 1 and r 2 . (3) for best accuracy, r2 should be kept smaller than 40k to ensure that the current flowing through r2 is at least 100 times larger than i fb . changing the sum towards a lower value increases the robustness against noise injection. changing the sum towards higher values reduces the quiescent current and supports the snooze mode function for achieving highest efficiency at low load currents. for lowest quiescent current during the snooze mode, it is recommended to use a fixed output voltage version like tps62081 and tps62082. pcb layout the pcb layout is an important step to maintain the high performance of the tps6208x devices. the input/output capacitors and the inductor should be placed as close as possible to the ic. this keeps the traces short. routing these traces direct and wide results in low trace resistance and low parasitic inductance. a common power gnd should be used. the low side of the input and output capacitors must be connected properly to the power gnd to avoid a gnd potential shift. the sense traces connected to fb and vos pins are signal traces. special care should be taken to avoid noise being induced. by a direct routing, parasitic inductance can be kept small. gnd layers might be used for shielding. keep these traces away from sw nodes. 16 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082 ? ? ? ? + = ? ? ? ? + = 2r 1r 1 v 45.0 2r 1r 1 v v fb out TPS62080 1 m h 10f 2.3v .. 6v r 1 r 2 v in power good sw vos vinen gnd mode pg fb 22f 180k v out
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 figure 32. pcb layout suggestion thermal information implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires special attention to power dissipation. many system-dependent issues such as thermal coupling, airflow, added heat sinks and convection surfaces, and the presence of other heat-generating components affect the power- dissipation limits of a given component. three basic approaches for enhancing thermal performance are listed below: ? improving the power dissipation capability of the pcb design ? improving the thermal coupling of the component to the pcb by soldering the thermalpad ? ? introducing airflow in the system for more details on how to use the thermal parameters, see the application notes: thermal characteristics application notes szza017 and spra953 . application examples figure 33. 3.3v fixed output voltage application (tps62082) copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 17 product folder links: TPS62080 TPS62080a tps62081 tps62082 tps62082 1 h 10f 3.6v .. 6v v in 22f 180k v out power good 3.3v sw vos vinen gnd mode pg fb l c in c out r 2 r 1 v in v out gnd 1
TPS62080 , TPS62080a tps62081 , tps62082 slvsae8d ? september 2011 ? revised july 2013 www.ti.com figure 34. 1.2v output voltage application (TPS62080) figure 35. 2.5v output voltage application (TPS62080) 18 submit documentation feedback copyright ? 2011 ? 2013, texas instruments incorporated product folder links: TPS62080 TPS62080a tps62081 tps62082 TPS62080 1 m h 10f 3.0v .. 6v 178.6k 39.2k v in power good sw vos vinen gnd mode pg fb 22f 180k v out 2.5v TPS62080 1 m h 10f 2.3v .. 6v 65.3k 39.2k v in power good sw vos vinen gnd mode pg fb 22f 180k v out 1.2v
TPS62080 , TPS62080a tps62081 , tps62082 www.ti.com slvsae8d ? september 2011 ? revised july 2013 revision history changes from original (september 2011) to revision a page ? added TPS62080a device .................................................................................................................................................... 1 ? added TPS62080adsg (product preview) and TPS62080adgn (product preview) to ordering information ...... 2 ? added TPS62080a output discharge resistor ....................................................................................................................... 3 changes from revision a (february 2012) to revision b page ? changed TPS62080adsg from product preview to production data in ordering information .............................. 2 changes from revision b (march 2012) to revision c page ? changed the thermal information tables values .................................................................................................................. 2 changes from revision c (may 2013) to revision d page ? deleted TPS62080adgn from ordering information table ..................................................................................... 2 ? deleted TPS62080a column from the thermal information table ........................................................................................ 2 copyright ? 2011 ? 2013, texas instruments incorporated submit documentation feedback 19 product folder links: TPS62080 TPS62080a tps62081 tps62082
package option addendum www.ti.com 24-jun-2013 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) op temp (c) device marking (4/5) samples TPS62080adgnr preview msop- powerpad dgn 8 2500 tbd call ti call ti -40 to 85 TPS62080adgnt preview msop- powerpad dgn 8 250 tbd call ti call ti -40 to 85 TPS62080adsgr active wson dsg 8 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 sbn TPS62080adsgt active wson dsg 8 250 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 sbn TPS62080dsgr active wson dsg 8 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 qvr TPS62080dsgt active wson dsg 8 250 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 qvr tps62081dsgr active wson dsg 8 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 qvs tps62081dsgt active wson dsg 8 250 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 qvs tps62082dsgr active wson dsg 8 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 qvt tps62082dsgt active wson dsg 8 250 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 qvt (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material)
package option addendum www.ti.com 24-jun-2013 addendum-page 2 (3) msl, peak temp. -- the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis.
tape and reel information *all dimensions are nominal device package type package drawing pins spq reel diameter (mm) reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant TPS62080adsgr wson dsg 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 TPS62080adsgt wson dsg 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 TPS62080dsgr wson dsg 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 TPS62080dsgt wson dsg 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 tps62081dsgr wson dsg 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 tps62081dsgt wson dsg 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 tps62082dsgr wson dsg 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 tps62082dsgt wson dsg 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 package materials information www.ti.com 24-jun-2013 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) TPS62080adsgr wson dsg 8 3000 195.0 200.0 45.0 TPS62080adsgt wson dsg 8 250 195.0 200.0 45.0 TPS62080dsgr wson dsg 8 3000 195.0 200.0 45.0 TPS62080dsgt wson dsg 8 250 195.0 200.0 45.0 tps62081dsgr wson dsg 8 3000 195.0 200.0 45.0 tps62081dsgt wson dsg 8 250 195.0 200.0 45.0 tps62082dsgr wson dsg 8 3000 195.0 200.0 45.0 tps62082dsgt wson dsg 8 250 195.0 200.0 45.0 package materials information www.ti.com 24-jun-2013 pack materials-page 2

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